JP3051727U - Golf club - Google Patents

Abstract

(57) [Problem] To provide a golf club which can be produced only by cutting a thick end by an extra length. SOLUTION: This golf club 20 is a hollow elongated rod, and has a thin end 21 and a thick end 22. Between both ends is a rod 23 having a diameter that gradually changes like a smooth taper. The rod 23 is provided with a sudden change in outer diameter 24 at a distance from the thin end 21 by a predetermined length. Since the outer diameter D of the outer diameter sudden change portion 24 is different from the original outer diameter D ′, a flexible point is formed in the outer diameter sudden change portion 24 when the ball is hit.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to golf equipment, and more particularly to a golf club.

[0002]

[Prior art]

 As is well known, golf clubs, whether wooden or iron, have a smaller rod number and a longer length. Conversely, the higher the number of the rod, the shorter the length. As shown in FIG. 1, a conventional golf club is manufactured by cutting a golf club of the same size according to design requirements by cutting a local length at a narrow end or a wide end, or by cutting a local length at both ends. Can be So you get different lengths and flexible elasticity. For example, the No. 9 iron rod is the shortest, and the ball hit distance is short. The main application is to hit the ball to the green. Because good ball control is required, a hard golf club is required, and the narrow end is cut more. On the other hand, No. 3 iron rod is long, and the distance to hit the ball is long. Its primary use is to hit a ball over long distances, and it requires an elastic golf club, which cuts the narrow end slightly.

[0003]

[Problems to be solved by the invention]

 However, the cutting method described above must be performed by skilled workers and skilled workers. Otherwise, wrong cuts will always occur. Also, the thin end of the golf club must be joined to the head. At different cutting positions, different internal bores are formed, so the head has to be designed to correspond to the neck of the bore, which is troublesome for construction.

[0004] Accordingly, an object of the present invention is to provide a golf club with a simple production operation in which a thick end is cut by an extra length and a thin end is not required.

[0005]

[Means for Solving the Problems]

 According to the measure of the present invention for solving the above-mentioned problems, the golf club is a hollow elongated rod having a narrow end and a wide end. Between both ends is a rod with a gradually changing diameter, such as a smooth taper. The rod is provided with an abrupt change in outer diameter at a predetermined distance from the narrow end. Since the sudden change in outer diameter is different from the original outer diameter, a flexible point is formed in the change when the ball is hit.

[0006] With the above structure, the golf club required can be completed by cutting just an extra length. The required elasticity is determined by the location of the sudden change in outer diameter, and the closer the narrow end, the harder the golf club. On the other hand, the further away from the thin end, the softer the golf club and the more flexible the golf club.

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment) First, FIG. 2 shows a first embodiment of the present invention. Golf club 20 is a hollow elongated rod, including a thin end 21 for inserting a head and a thick end 22 for inserting a handle. A rod 23 having a diameter gradually changing like a smooth taper is formed between both ends.

The rod is provided with a sudden change in outer diameter 24 at a predetermined distance from the thin end 21. Since the outer diameter of the outer diameter suddenly changing portion is larger than the original outer diameter D, a flexible point is formed in the changing portion when the ball is hit. The required elasticity is determined by the distance between the location of the sudden change in outer diameter 24 and the narrow end 21. For example, the closer the position of the sudden change of the outer diameter 24 to the thin end 21, that is, the shorter the distance between the thin end 21 and the stress torsion point, the smaller the flexible elasticity and the harder the golf club. In contrast, the further the distance from the narrow end, that is, the longer the distance between the narrow end 21 and the stress torsion point, the softer the golf club becomes and the more elastic the golf club becomes. In short, as shown in FIG. 3, in the design, in the same series of iron rods, the outer diameter suddenly changing portion 24 of the ninth iron rod is separated from the narrow end 21 by a minimum distance, and the rod number is gradually reduced. The less the distance, the more the distance increases. Of course, the same can be applied to a wooden stick. After all, it is not necessary to cut the thin end 21 of the golf club, and only the unnecessary portion of the thick end 22 need be cut, so that the production can be said to be simple. Further, the size of the thin end 21 is not changed. Even if the rod number is different, the head may adopt a single size neck joint structure because the axial hole size of the thin end 21 is the same. Doing so can simplify production work.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention. The golf club 30 according to the second embodiment includes elements such as a thin end 31, a thick end 32, a rod 33, and a sudden change in outer diameter 34. The difference from the first embodiment is that the outer diameter D of the suddenly changing outer diameter portion is smaller than the original outer diameter D 'at that position, and a flexible point is formed at the changing portion when the ball is hit. You.

Third Embodiment FIG. 5 shows a third embodiment of the present invention. The golf club 40 according to the third embodiment includes elements such as a thin end 41, a thick end 42, a rod 43, and a sudden change in outer diameter 44. The difference from the first embodiment and the second embodiment is that a sudden change in outer diameter is formed by a small diameter portion 45 and a large diameter portion 46. The small diameter portion 45 approaches the narrow end 41, and its outer diameter d is smaller than the original outer diameter d 'at that position. Since the large diameter portion 46 approaches the small diameter portion 45 and its outer diameter D is larger than the original outer diameter D 'at the position, a flexible point is clearly formed in the small diameter portion 45.

[0011] Further, the design of the flexible point may be such that the flexible point is located within a range in which the sudden change portion of the outer diameter is separated from the narrow end by 2/5 the length of the golf club. As shown in FIG. 5, the length L is between 50 mm and 80 mm.

[Brief description of the drawings]

FIG. 1 is a front view showing a conventional golf club.

FIG. 2 is a front view showing the golf club according to the first embodiment of the present invention.

FIG. 3 is a view illustrating golf clubs having different numbers according to the first embodiment of the present invention;

FIG. 4 is a front view showing a golf club according to a second embodiment of the present invention.

FIG. 5 is a front view illustrating a golf club according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 20 golf club 21 thin end 22 thick end 23 rod 24 sudden change in outer diameter 30 golf club 31 thin end 32 thick end 33 rod 34 sudden change in outer diameter 40 golf club 41 thin end 42 thick end 43 rod 44 outside Sudden diameter change 45 small diameter 46 large diameter

Claims (5)

[Utility model registration claims] 1. A hollow, elongated rod-shaped golf club, comprising a rod provided between a narrow end and a thick end and having a diameter gradually changing in a smooth taper shape, wherein the rod includes: An abrupt outer diameter change portion is provided at a predetermined distance from the thin end, and the outer diameter of the abrupt outer diameter change portion is different from the original outer diameter at the position of the outer diameter abrupt change portion. A golf club, wherein a flexible point is formed in the sudden change in outer diameter when hitting. 2. The golf club according to claim 1, wherein the sudden change in outer diameter is located in a range separated from the elongate end by a length of ／ of the golf club. 3. The golf club according to claim 1, wherein an outer diameter of the outer diameter suddenly changing portion is larger than an original outer diameter at a position of the outer diameter suddenly changing portion. 4. The golf club according to claim 1, wherein an outer diameter of the outer diameter suddenly changing portion is smaller than an original outer diameter at a position of the outer diameter suddenly changing portion. 5. The outer diameter suddenly changing portion has a small diameter portion and a large diameter portion, wherein the small diameter portion approaches the narrow end, and the outer diameter is smaller than the original outer diameter at the position of the small diameter portion. The golf club according to claim 1, wherein the large diameter portion is small and approaches the small diameter portion, and the outer diameter is larger than the original outer diameter at the position of the large diameter portion.